One thing I didn't really like about oblivion was that at around level 30, there were no new sets of armor/weapons to attain when dungeon crawling. A mod I think would really increase the life of skyrim (for me if not anyone else :( ) would be to included mod weapons (i.e 3rd party weapons made by community) but only with higher level drop scenarios . eg, Zignotium Glass, levels 50 , Dignified Steel level 62, . That way, there is still incentive to level past daedric and well into level 80. Already there are fantastic mods releaseing brand new models with amazing textures, only if you could incorporate them so as to not get them at low levels, make them above daedric. Whenever I would get an amazing armor or weapon mod in oblivion from tesnexus, it would either be spawned in my inventory or i could buy it from the local trader for 15k, even at low levels. This made it waay to easy for me. Aswell, whole kits could be produced, i.e Zignotium Glass armor and weapons, this would in turn make mobs harder as they would sparsely have this gear too. Just my 2c Leave some ideas if you have any.